Benchmark tests

All tests were performed on the same computer (Intel Core i5-4440 3.1
GHz, DDR3 12 GB) with the same compiler configuration (optimization -
maximum performance), in one thread. The test performs multiple
serialization and deserialization of the data structure. The test were
performed several times to obtain the an average time.

The first test includes the array "vouchers", containing two elements
"voucher"; the amount of useful data is 92 bytes. In the second test,
the array’s size is 1000 elements and the amount of useful data is
35,890 bytes. The tests results are shown below. The source code can be
provided upon request.